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    <title>Data Flow Mermaid Quick Test Page</title>
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    <h1>Data Flow Diagram demos</h1>
    <pre class="mermaid">
    flowchart LR
      accTitle: A simple linear flowchart.
      accDescr: A Database has input to a circle System has output to a square Customer.
      DataStore[|borders:tb|Database] -->|input| Process((System)) -->|output| Entity[Customer];
    </pre>

    <hr />

    <h2>Borders Example</h2>
    <pre class="mermaid">
    flowchart TD
      allSides[ stroke all sides ];
      allSides2[|borders:ltrb| stroke all sides ];
      rbSides[|borders:rb| stroke right and bottom sides ];
      ltSides[|borders:lt| stroke left and top sides ];
      lrSides[|borders:lr| stroke left and right sides ];
      noSide[|borders:no| stroke no side ];
    </pre>

    <script type="module">
      import mermaid from './mermaid.esm.mjs';
      mermaid.initialize({
        theme: 'forest',
        logLevel: 3,
        securityLevel: 'loose',
        flowchart: { curve: 'basis' },
      });
    </script>
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      function testClick(nodeId) {
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        document.querySelector('body').style.backgroundColor = 'yellow';
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